Model 70

Pressure Reducing Valve with Integral By-pass (3/4” & 1”)

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 Installation  Maintenance Instructions
REPAIR KIT INSTRUCTIONS HOW TO MAKE REPAIRS: (Shut off service before starting disassembly) 1. Open faucet on dwelling to remove line pressure. 2. Note distance that adjustment bolt protrudes from bell housing. Loosen locknut on adjustment bolt, then turn adjustment bolt out of bell housing to remove spring tension. 3. Unscrew bell housing counterclockwise and remove spring, spring disc and friction ring. 4. While holding diaphragm, unscrew diaphragm bolt counterclockwise and remove bolt, diaphragm disc and diaphragm. 5. Remove cartridge counterclockwise; Use a 1-1/8” socket for the 3/4” and a 1-3/8” socket for the 1”. Make sure cartridge gasket is removed from the body. TO REASSEMBLE: 1. While disassembled, open inlet of water service to flush out valve body and service line of debris. 2. Lubricate o-ring on replacement cartridge then thread into body clockwise. 3. Replace diaphragm, diaphragm disc and diaphragm bolt (It is necessary to hold diaphragm while tightening diaphragm bolt.). 4. Replace friction ring, spring, spring disc and bell housing. Tighten bell housing onto body by threading clockwise. 5. Turn adjustment bolt into bell housing to old setting. 6. Enter dwelling and turn on several faucets. 7. Turn on water service. Let water run for several seconds then turn off faucets in dwelling. 8. Adjust regulator to desired pressure by turning adjusment bolt clockwise (into bell housing) to raise pressure or counterclock-wise (out of bell housing) to lower pressure. It is recommended a pressure gauge be installed down stream of the regulator to ensure pressure is reduced below 75 psi. NOTE: When reducing pressure, open a down stream faucet to relieve pressure. 9. Tighten locknut when desired pressure is achieved. INSTALLATION INSTRUCTIONS Install valve in line with arrow on valve body pointing in direction of flow. Before installing reducing valve, flush out line to remove loose dirt and scale which might damage seal ring and seat. All valves will be furnished with stock settings to reduce to 50 psi. To readjust reduced pressure, loosen outer locknut and turn adjustment bolt clockwise (into bell housing) to raise reduced pressure, or counterclockwise (out of bell housing) to lower reduced pressure. NOTICE: Annual inspection and maintenance is required of all plumbing system components. To ensure proper performance and maximum life, this product must be subject to regular inspection, testing and cleaning.
ADJUSTMENT BOLT LOCKNUT SEALED CAGE WASHER NAMEPLATE

BELL HOUSING
*FRICTION RING

*SPRING DISC

*SPRING

*DIAPHRAGM BOLT

*DIAPHRAGM DISC *DIAPHRAGM

*CARTRIDGE *CARTRIDGE GASKET *UNION GASKET TAILPIECE
I L K I N

*SEAL RING BODY

UNION NUT

*INDICATES PARTS SUPPLIED IN REPAIR KITS

Regulators in series: Where the desired pressure reduction is more than a 4 to 1 ratio (i.e. 200psi to 50psi), multiple regulators in series should be installed. SEALED CAGE WARNING: Loosen lock washer at adjustment bolt slowly. Look for any trapped water pressure under the sealed cage washer. Relieve pressure before removing bell. CAUTION: Anytime a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting. Do not bottom out adjustment bolt on bell housing. Valve may be installed in any position.

WARRANTY: WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recommended. If in any recommended service, a defect develops due to material or workmanship, and the device is returned, freight prepaid, to WILKINS within 12 months from date of purchase, it will be repaired or replaced free of charge. WILKINS’ liability shall be limited to our agreement to repair or replace the valve only.

Proposition 65 Warning This product contains chemicals known to the State of California to cause cancer or birth defects or other reproductive harm.
This product is not to be used to convey water for human consumption through cooking or drinking in California or Vermont. California H&S Code §116875, VSA §2470h

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SOLUTION
a. B.
Small. Cut or worn stem o-ring or worn o-ring groove. Under the maximum probable fixture use. CA 93446 Phone:805/238-7100 Fax:805/238-5766
WILKINS. Relatively high service pressures which can create high water velocities in pipe lines would allow use of smaller pipes to satisfy fixture use. Screen clogged with debris. A. Heavy periodic demands by appliances in the house.
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IS70 (REV. Cut. b. If a deep channel appears on seal ring face. the valve size should be no less then the existing pipe size. A pressure relief valve or expansion tank must be installed. b. whistles or chatters. Hum or whistle is usually caused by a high velocity of flow in pipelines causing vibration. replace or use the opposite side. There is a general tendency to use streamline piping of a relatively small size. worn or chipped seal ring. b.
Valve appears to be noisy. B. Chatter usually originates with worn seat washer or loosely installed seal ring. may reduce pipe line capacities below that which is adequate for maximum probable use. Size of some pipelines may need to be increased.Troubleshooting
Pipe lines in a water supply system must be of sufficient carrying capacity to maintain adequate pressure at the most remote or highest fixture.
POSSIBLE CAUSE OR CAUSES
A. c. When actual water demands are unknown. A. Heavy periodic demands by appliances in the house. D. Pipelines could be small or too light. This is a water department problem. either continuously or periodically.
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PROBLEM
1. inadequate flow from fixtures. Raise pressure gradually by readjusting valve until this point is determined.
Pressure and fixture flow is unsteady.
Thermal expansion of water as it is being heated. House service lines may at times be inadequate for the load.
It may be necessary to increase pipe sizes only in some sections of the system leading to the offending appliances or fixtures. the application of a pressure reducing valve will be successful only when the installed pipe line is of adequate size to satisfy the system demand at the lower pressure. minimum adequate pressure is generally 8 to 15 lbs. Frequently noise appears in a faucet or appliance and seems to originate from the reducing valve. It may happen each time that the heater runs. depending on the equipment being supplied. a ZURN company
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SOLUTION
a. Reducing valves could be too small. c.
3. C. This will not prevent pressure rise but should limit it to a safe level. It is due to the mains being inadequate for the demands made on them. This is a natural consequence. However. b. high velocity tends to cause whistling and humming. Flush the reducing valve by opening one or two fixture outlets wide. Pressure setting of reducing valve may be too low. in an attempt to eliminate such a condition. 7/10)
1747 Commerce Way.
2. hums. d. B. Velocity is naturally high and noise of fast moving water is not unusual. but may be more. Pipes and valves being small would accentuate this condition. remove seal ring for cleaning. Paso Robles. Increasing the house service mains might be necessary if small supply is general at all fixtures.
SOLUTION
a. Replace with new stem o-ring and/or cartridge.
Pressure creeps or builds up in system above the setting of pressure reducing valve. Low water supply pressure in mains caused possibly by high area demand during certain periods of the day. Temporary repairs may be made by turning the seal ring over.
SOLUTION
a. B. Replace with new seal ring. Clean screen. A. If this does not correct the problem. c. Pipelines to fixtures may be too small or house main supply may be inadequate for normal fixture demand. Reduction of pressure by the use of a pressure reducing valve. Foreign matter on seating face of seal ring. Inspect seal ring. When high service pressures are in effect. Try increasing pressure before changing pipelines.